写了一个声明式的 flask 代理插件，欢迎拍砖交流

目前支持声明式的路由，同时还可以对原请求做二次处理，比较适合用来做微服务的 API 网关代理，欢迎 PR 和 issue https://github.com/mecforlove/flask-proxy

简单的 demo

from flask import Flask
from flask_proxy import Proxy, Upstream


class Httpbin(Upstream):
    prefix = '/httpbin'
    host = 'httpbin.org'
    routes = [{
        'url': '/get',
        'methods': ['GET'],
    }, {
        'url': '/post',
        'methods': ['POST'],
    }]

app = Flask(__name__)
proxy = Proxy(app)
proxy.add_upstream(Httpbin)
app.run()